Are we assuming the systems the AI is building are systems for humans?

Continuous learning systems aren't there yet, though we have the proto-learning systems with things like agents and skills. What does it look like when we have AI systems building systems for other AI systems?

Is that quote really true? I've always understood "bottleneck" as the slowest part of a system, so a system without a bottleneck simply has all parts being equally fast, it isn't necessarily infinitely fast.